The daily feeding rate using a self-feeding method was studied in several groups of gilthead sea bream following weighing. The first day after weighing all groups showed a significant decrease in feeding rate up to 66% in animals of 179 g. A partial compensation for this initial intake deficiency was recorded during the next day. A fluctuating feeding rate with compensations occurring from one day to the next was also observed over the study period. The results are discussed on the basis of methodology and experimental consistency. © 1994.